Donor impurity states and related optical response in a lateral coupled dot-ring system under applied electric field

被引：4
|
作者：
Correa, J. D. [1 ]
Mora-Ramos, M. E. [2 ]
Duque, C. A. [3 ]
机构：
[1] Univ Medellin, Dept Ciencias Basicas, Medellin, Colombia
[2] Univ Autonoma Estadode Morelos, Inst Ciencias Basicas & Aplicadas, Ctr Invest Ciencias, Cuernavaca 62209, Morelos, Mexico
[3] Univ Antioquia UdeA, Fac Ciencias Exactas & Nat, Inst Fis, Grp Mat Condensada UdeA, Medellin, Colombia
来源：
PHYSICA B-CONDENSED MATTER | 2015年 / 472卷
关键词：
D O I：
10.1016/j.physb.2015.05.012
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
A study on the effects of an externally applied electric held on the linear optical absorption and relative refractive index change associated with transitions between off-center donor impurity states in laterally coupled quantum dot-ring system is reported. Electron states are calculated within the effective mass and parabolic band approximations by means of an exact diagonalization procedure. The states and the optical response in each case show significant sensitivity to the geometrical distribution of confining energies as well as to the strength of the applied field. (C) 2015 Elsevier B.V. All rights reserved.
引用
收藏
页码：25 / 33
页数：9
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